How to Understand the Change in pH on Dilution – Part 1

pH is a logarithmic scale used to specify the acidity or basicity of aqueous solutions.


Acidic solutions (with higher concentrations of hydrogen (H+) cations) are measured to have lower pH values than basic or alkaline solutions. The neutral pH is 7. A 𝑝𝐻 meter may be used for a precise and accurate measurement of the 𝑝𝐻 of a solution.

Question:

Which step would convert 100 mL of KOH solution with a pH of 13 to a KOH solution with a pH of 12?

Solution:



Click/tap to enlarge the image

The pH scale is a log10 scale, so a pH of 12 is 10 times more acidic than a pH of 13.

Pestered by pH changes❓ Let Chemaficionado know in the comments below or at mychemistryhomework@gmail.com❗

References:

‌(1)    Ncert. Chemistry : Textbook for Class XI - Part.I; National Council Of Educational Research And Training: New Delhi.

(2)    Wikipedia Contributors. pH. Wikipedia. https://en.wikipedia.org/wiki/PH.

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